config.yml

global:
  # The smarthost and SMTP sender used for mail notifications.
  smtp_smarthost: 'smtp.gmail.com:587'
  smtp_from: '<sender-email-address>'
  smtp_auth_username: "<sender-email-address>"
  smtp_auth_password: '<sender-email-password>'
route:
  group_by: [Alertname]
  # Send all notifications to me.
  receiver: email-me
receivers:
- name: email-me
  email_configs:
  - to: <receiver-email-address>
    from: <sender-email-address>
    smarthost: smtp.gmail.com:587
    auth_username: "<sender-email-address>"
    auth_identity: "<sender-email-address>"
    auth_password: "<sender-email-password>"